Form the perfect tense using the auxiliary verb 'haber' and a past participle. Irregular verbs in the perfect tense in Spanish The perfect tense is made of the verb 'haber' and a past participle.

In this sentence, the subject is Matt and Nate, which is plural; thus, we have to change our verb to eat. A regular verb is one that conforms to the rules of grammar, whereas an irregular ... besides ...